I've got 2 Jimbo Philips edition Bell helmets.
I took a close up photo of the skate lid with a black & white camera setting on my phone. Then I just printed on vinyl.
It hasn't lasted too badly either.

lt seems to make a small difference.
Why do Fox make so many adjustment settings ?!! Very fiddly!

Too many most people complain about not enough...
I'm guessing you have the trail adjust low speed compression. This only works in trail mode. There should be a very noticeable difference between c and d. There isn't on mine anymore and it's going back after Christmas.

My SB66c is plush as you like, but it is very supportive at the top of the stroke, you need to get it into the suspension to get it working. This can appear to manifest itself as harshness at the top of the stroke, I'd imagine much more than on a 575, which will feel plush/smooth all the way through the travel. What this initial resistance on the SB66 does provide is a much better support feeling to push against when pedalling, the suspension only seeming to really kick in when you really push it.

Two very different bikes, so maybe if the shock is set right, its not the bike for you? I love mine compared to my old Stumpjumper FSR which I imagine is very much like the 575, very active suspension, but I found it sapped a lot from my riding. The SB66 allows you to work the bike much more, pumping and popping off stuff that the FSR would just sap up.

Who gives a monkeys how much money some one has, or has spent on THEIR bike, people work hard to earn it let them spend it as the wish!!! SB66 looks awesome, capable of a multitude of riding, even DH World Cup, my advise would be to speak to LoCo or the like, they'll sort you out.

Can't believe some people!
The OP has just asked for advice on his purchase, and yet the "more money than sense" comments start. Not possibly from people who don't find themselves in the position to buy what they want after grafting for it I wonder.
People can buy what they want with their own money, it's not a requirement to get permission from the STW community. Get a life.

You could run less air pressure, get the shock tuned or move to a different shock without boost valve gash.

Boost valve on xc shocks adds firmness at beginning of stroke, opens up mid stroke then ramps up end of stroke. Take a suspension design which is firm off the top, combine that with a shock which is firm off the top, you're going to have a super firm beginning stroke.

I had a vivid air on mine, improved subtlety beginning stroke, more support mid and end stroke. I had the problem that once i got going, the fox shock used its travel too easily.

The OP has just asked for advice on his purchase, and yet the "more money than sense" comments start. Not possibly from people who don't find themselves in the position to buy what they want after grafting for it I wonder.
People can buy what they want with their own money, it's not a requirement to get permission from the STW community. Get a life.

Maybe my comment was a bit harsh, however, I can buy whatever I want thanks.

The difference being, when I do spend my hard earned on something expensive, I research it first.

It just struck me that the OP was buying expensive bikes, without knowing what he was buying, hence I stand by my comment.

Of course it's the OP's prerogative to buy what he wants, so apologies if any offence caused.

I admire the guy for going and buying a sb66, I bought a asr 5 couple of
years ago, it was well out of my budget and riding capabilities, and its made me into a better rider. And it took two years to pay for it, rather than sticking it away in my savings account with no interest.

I have had a 575 and now have the sb66 they do feel harsh compared to the 575 but that is the switch system to help it pedal, there is noway to make it feel like the 575 even on the descent mode on the shock which is as plush as you can get the sb66.
I would ask to get the shock tune but it will never seem like the 575. Good luck

Your right there Paulwatts the 66 is made to be ridden/raced hard and fast to feel the benefit but if you ride it in the descent mode with a plush sag setting 30% (about 19mm) it should feel good to ride around the forest.
I loved the 575 an only got the 66 for the slacker head angle/bit more travel as I do a lot big mountain/alps style riding which the 66 is better for the Descents. Hope it feels better riding it like this.